@ COPPER_HEAD_GASKET 50_&_70_HONDA'S XR_CRF_Z_CT_ATC TRX90_&_70 ALSO LIFAN AND ZONGSHEN CU/50/70/90PICK_BORE/THICKNESS: HERE39/40MM/.016"=.38MM39/40MM/.021"=.5MM39/40MM/.032"=.76MM47MM/.016"=.38MM47/48MM/.062"=1.5mm50MM/.042"=1.0MM52MM/.016"=.38MM52MM/.032"=.75MM52MM/.042"=1.0MM52MM/.062"=1.5MM52.4MM/.016"=.38MM52.4MM/.032"=.75MM52.4MM/.042"=1.0MM54MM/.016"=.38MM54MM/.042"=1.0MM54MM/.062"=1.5MM @ NEW!!! ALLOY_CYLINDER BASE_GASKETS !! IN_1_1.5_&_2MM THICKNESS'S 50_&_70_HONDA'S XR_CRF_Z_CT_ATC TRX90_&_70 CLONE/50/70/90 ALLOYBASEPICK_THE_THICKNESS: 1.0MM(360W)1.5MM(360X)2.0MM(360Y)